Question

我正在尝试使用ObjectOutputStream而不是DeflaterOutputStream来将泄露的数据写入基础流。但是当我尝试使用InputStream对应的数据读取数据时，会抛出异常。值得注意的是，将Deflate{Output,Input}Stream替换为GZip{Output,Input}Stream，它会按预期工作。显示此行为的示例代码如下所示：

ByteArrayOutputStream baos = new ByteArrayOutputStream();
try(ObjectOutputStream oos = new ObjectOutputStream(new DeflaterOutputStream(baos))) {
    oos.writeObject("test");
}

ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
try(ObjectInputStream oos = new ObjectInputStream(new DeflaterInputStream(bais))) {
    System.out.println(oos.readObject());
}

抛出以下异常：

Exception in thread "main" java.io.StreamCorruptedException: invalid stream header: 789CAB98
    at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:857)
    at java.io.ObjectInputStream.<init>(ObjectInputStream.java:349)
    at Main.main(Main.java:23)

有谁知道为什么会出现这种情况？

Answer 1

我已经弄清楚这是一个愚蠢的错误。但是回答我自己的问题，以便未来的人们不再为此而堕落：

05-02 16:16:37.485 8627-8656/com.ana7tasys.kubo A/art: art/runtime/check_jni.cc:65] JNI DETECTED ERROR IN APPLICATION: JNI CallVoidMethodV called with pending exception 'java.lang.ClassCastException' thrown in unknown throw location 05-02 16:16:37.486 8627-8656/com.ana7tasys.kubo A/art: art/runtime/check_jni.cc:65] in call to CallVoidMethodV 05-02 16:16:37.486 8627-8656/com.ana7tasys.kubo A/art: art/runtime/check_jni.cc:65] from void com.badlogic.gdx.physics.box2d.World.jniStep(long, float, int, int) 05-02 16:16:37.486 8627-8656/com.ana7tasys.kubo A/art: art/runtime/check_jni.cc:65] "GLThread 239" prio=5 tid=13 Runnable 05-02 16:16:37.486 8627-8656/com.ana7tasys.kubo A/art: art/runtime/check_jni.cc:65] | group="main" sCount=0 dsCount=0 obj=0x12c22640 self=0xb4033800 05-02 16:16:37.486 8627-8656/com.ana7tasys.kubo A/art: art/runtime/check_jni.cc:65] | sysTid=8656 nice=0 cgrp=default sched=0/0 handle=0xb4054a00 05-02 16:16:37.486 8627-8656/com.ana7tasys.kubo A/art: art/runtime/check_jni.cc:65] | state=R schedstat=( 0 0 0 ) utm=1460 stm=1139 core=1 HZ=100 05-02 16:16:37.486 8627-8656/com.ana7tasys.kubo A/art: art/runtime/check_jni.cc:65] | stack=0xa4da6000-0xa4da8000 stackSize=1036KB 05-02 16:16:37.486 8627-8656/com.ana7tasys.kubo A/art: art/runtime/check_jni.cc:65] | held mutexes= "mutator lock"(shared held) 05-02 16:16:37.486 8627-8656/com.ana7tasys.kubo A/art: art/runtime/check_jni.cc:65] native: #00 pc 00005d03 /system/lib/libbacktrace_libc++.so (UnwindCurrent::Unwind(unsigned int, ucontext*)+83) at com.badlogic.gdx.physics.box2d.World.jniStep(Native method) 05-02 16:16:37.487 8627-8656/com.ana7tasys.kubo A/art: art/runtime/check_jni.cc:65] at com.badlogic.gdx.physics.box2d.World.step(World.java:689) 05-02 16:16:37.487 8627-8656/com.ana7tasys.kubo A/art: art/runtime/check_jni.cc:65] at com.ana7tasys.kubo.Screens.PlayScreen.update(PlayScreen.java:188) 05-02 16:16:37.487 8627-8656/com.ana7tasys.kubo A/art: art/runtime/check_jni.cc:65] at com.ana7tasys.kubo.Screens.PlayScreen.render(PlayScreen.java:232) 05-02 16:16:37.487 8627-8656/com.ana7tasys.kubo A/art: art/runtime/check_jni.cc:65] at com.badlogic.gdx.Game.render(Game.java:46) 05-02 16:16:37.487 8627-8656/com.ana7tasys.kubo A/art: art/runtime/check_jni.cc:65] at com.ana7tasys.kubo.KuboGame.render(KuboGame.java:50) 05-02 16:16:37.487 8627-8656/com.ana7tasys.kubo A/art: art/runtime/check_jni.cc:65] at com.badlogic.gdx.backends.android.AndroidGraphics.onDrawFrame(AndroidGraphics.java:459) 05-02 16:16:37.487 8627-8656/com.ana7tasys.kubo A/art: art/runtime/check_jni.cc:65] at android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1522) 05-02 16:16:37.487 8627-8656/com.ana7tasys.kubo A/art: art/runtime/check_jni.cc:65] at android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1239) 05-02 16:16:37.487 8627-8656/com.ana7tasys.kubo A/art: art/runtime/check_jni.cc:65] 05-02 16:16:37.551 8627-8656/com.ana7tasys.kubo A/art: art/runtime/runtime.cc:289] Runtime aborting... 05-02 16:16:37.551 8627-8656/com.ana7tasys.kubo A/art: art/runtime/runtime.cc:289] Aborting thread: 05-02 16:16:37.551 8627-8656/com.ana7tasys.kubo A/art: art/runtime/runtime.cc:289] "GLThread 239" prio=5 tid=13 Native 05-02 16:16:37.551 8627-8656/com.ana7tasys.kubo A/art: art/runtime/runtime.cc:289] | group="" sCount=0 dsCount=0 obj=0x12c22640 self=0xb4033800 05-02 16:16:37.551 8627-8656/com.ana7tasys.kubo A/art: art/runtime/runtime.cc:289] | sysTid=8656 nice=0 cgrp=default sched=0/0 handle=0xb4054a00 05-02 16:16:37.551 8627-8656/com.ana7tasys.kubo A/art: art/runtime/runtime.cc:289] | state=R schedstat=( 0 0 0 ) utm=1460 stm=1139 core=1 HZ=100 05-02 16:16:37.551 8627-8656/com.ana7tasys.kubo A/art: art/runtime/runtime.cc:289] | stack=0xa4da6000-0xa4da8000 stackSize=1036KB 05-02 16:16:37.551 8627-8656/com.ana7tasys.kubo A/art: art/runtime/runtime.cc:289] | held mutexes= "abort lock" "mutator lock" (shared held) 05-02 16:16:37.551 8627-8656/com.ana7tasys.kubo A/art: art/runtime/runtime.cc:289] native: #00 pc 00005d03 /system/lib/libbacktrace_libc++.so (UnwindCurrent::Unwind(unsigned int, ucontext*)+83)的反向类是DeflaterOutputStream，而不是InflaterInputStream。所以代码应该如下所示：

DeflaterInputStream

DeflaterInputStream上的ObjectInputStream抛出StreamCorruptedException

1 个答案: